Blank-presentation mechanism



Jul 21 1925.

Filed Feb. 18. 1924 4 Sheets-Sheet l 4 Shets-Sheet 2 Flled Feb 18. 1924rulmn ll July 21 1925;

I II I [593657;

July 21 1925.

A. N. CALKINS BLANK PRESENTATION MECHANISM Filed Feb. 18, 1924 4Sheets-Sheet 5 awuembo'z 14/15 a r/M [ZZZ/(171.9

July 21 1925.

1,546,914 A. N. CALKINS BLANK PRESENTATION MECHANISM filed Feb. 18, 19244 Shets-Sheet 4 F M J 45.

I lira UNITEDJSJ T'ATES PA'I -E N- T 'OFFICE.

ARTHUR N. PELHAM BAY, NEW YORK, ASSIGIYTOB TO BOWEN HARD- WARE(I!OIRLP-OIB/ATION,v OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

. BLANK-PRESENTATION MEGHjANISM.

Application filed February 18, 1924.5 SerialNo. 693,629. 7

The invention relates to presses 'foroperating on blanks, and moreespecially to the mechanism for presenting the blanks to the die membersthereof'and by which the said blanks are to be operated on. It has forits object to afford simple, rugged and reliable means for automaticallypresenting in succession to the desired set of dies of a press theshanks of headed blanks, for example a screw blank, the end ofwhose'shank is to be pointed by the said dies.

A further object of the invention consists in actuating the blankpresenting means thru the movement of the ram of the press and in mannersuch that the presentation and removal of a blank respectively to andfrom the dies will betimed to operate in synchronism with the descentand elevation of the said ram. Further objects of the invention consistin the provision of means for aligning a blank in the dies, in resilientsupporting and returning means therefor, and in means for positivelyejecting a finished blank. To this end, the improved mechanism consistsof a rotatable carrier member provided with a plurality of recesses orslots for receiving the blanks singly and which blanks are carriedthereby to the dies and presented in timed relationship to the movementof the ram of the press between the dies thereof, then removed therefromby the carrier and finally ejected from said carrier.

' The nature of the invention, however, will best be understood whendescribed in connection with the accompanying drawings, in which-- Fig.1 is a side elevation of the improved mechanism and a portion of a pressto which the same is attached.

Fig. 2 is a plan thereof.

Fig. 3 is a vertical section taken on the line 3-3, Fig. 2, and lookingin the direction'of the arrows.

Figs. 4 and 5 are fragmentary vertical sections taken on the line 45,Fig. 2, and looking respectively toward the carrier end and toward thepress.

Similar, characters of" reference designate corresponding parts thruoutthe several news.

Referring to the'drawings, 10 designates the frame ofa press shown ashaving a reciprocable ram 11., which it is preferred usually to inclineslightly to the vertical, and contains an upperdie holder 12 coactingwith a lower-die holder 13, said holders retaining respectively an upperdie member 14 and lower die member 15. In the present instance, theseare of a nature to point the end of the shank of a screw blank 16, allof which, however, is old and well-known and forms no particular featureof the present invention which relates more especiallyto the means forpresenting the blank be-' tween the die members 14 and 15 for thepointing action thereon.

This is effected by means of a rotary carrier member 20 which is mountedon and for rotation with a shaft 21, the carrier 20 rotary carriermember. which is in the nature of a circumferentially slotted disk, isan annular guide member 23 mounted, also about the shaft 21 and suitablysecured to the housing. This annular guide member surrounds thecircumference of the said rotary carrier disk 20, extending flush withthe outer face of the said disk: and is provided with an opening 24 intowhich extends the inner end of a chute 25. The latter may, for examplebe of the character set forth in my co-pending application filed of evendate herewith and is arranged for feeding into the housing and to thecarrier disk the blanks 16 to be pointed by the press. The sides of thischute are separable, as by the two screws 26. so that the chute mayaccommodate blanks whose shanks vary in diameter within the limits ofthe adjustment of the'said chute. This will necessitate, however. thesubstitution of a carrier provided with correspondingly sized slots. Thesaid carrier disk is provided with the requisite numbers of equallyspaced circumferential slots 27 which are designed to receive and tohold the shank of a headed blank as it is delivered thereto from thechute; and the disk may also be slightly inclined from the vertical andparallel to the lower ram 11 to assist in holding the head to thecarrier wall. Furthermore, more or less variation in length of theshanks of blanks of same shank diameter may be accommodated by a carrierand annular ring of a certain width, and which width should be as greatas possible to prevent undue rocking of a blank, by adjusting the diesof the press accordingly. However, it will also become necessary tosubstitute a carrier disk and an annular ring in instances'where thevariation of shank length is beyond the capacity of the carrier disk.

The carrier disk is designed to be given an intermittent rotationalmovement thru the shaft 21, said movement being imparted thereto fromthe ram of the press by a pawl and ratchet movement, as follows. Mountedon the shaft 21 is a ratchet wheel 30 with the teeth of which isdesigned to engage a pawl 31 secured to a pawl plate 32, the latterbeing loosely mounted on the said shaft 21 and the said pawl plate withpawl being rocked thru a telescopic connecting rod 33 of a well-knownconstruction. One end of this rod is secured to a stud or rod 34extending outwardly from the ram, the other end being suitably pinned tothe said pawl and pawl plate The spring 35 of the connecting rod 33serves to hold closely together the two parts of said connecting rod andwill thus allow of greater flexibility of the feeding mechanism andprevent stopping of the press in case of jamming of 'a blank. In such anevent, the shaft may be manually turned thru a knurled head of knob atits outer end to clear the blocking blank.

Provision is made, furthermore, for locking the shaft 21 and thru it thecarrier disk 20 thereon when the ram is down and the die is cutting thepoints on a blank. For example, a looking or stop wheel 36 is fixedlysecured to the shaft 21 and has provided therein circumferential teeth37 between which is adapted to fit a tooth 38 of a detent 39. As soon,however, as rotation of the shaft is again to occur, the pawl plate 32engages, thru a nose 40 thereon, with a trip 41 of the detent 39 torelease its tooth 38 from between the teeth 37 of the stop wheel.

Thru its rotation, the carrier member thus presents succesively'theblanks to the lower die member 15 and in the lowest position of the saidblank, as shown more clearly in Fig. 4 of the drawings. When a blank hasreached this position, a corresponding 'slot of the carrier disk memberis positioned just opposite the chute to receive a further blank; andonly one blank at a time is thus admitted to the carrier and at eachdownward movement of the ram of the press. When this downward motionoccurs, the upper die block holder descends .upon the die block holder;and provision is made in connection therewith for insuring properalignment of a blank in the lower die. tached to the upper die blockholder a small block 45 having a guiding yoke 46 which is designed toslide closely to the carrier disk to straddle and positively lock ablank centrally on the lower die. This action, also, brings the shank ofthe blank into a position to rest on a return slide block 50 which isurged upwardly by compression spring 51. Moreover, when the upper diecomes in contact with the blank, the latter has a tendency to recoilaxially, but the same is controlled by contact of the blank head withthe .inner end of a lever 52 oscillatable about a pin 53 under theaction of a spring 54; and the inward position of same relatively to theblank head is limited by an adjustable screw 55. As the ram startsupwardly with its yoke 46, the latter releases the ointed blank and thereturn slide block 50 orces it completely back into the carrier slot,clearing the die for the next blank. At the next stage of theintermittent movement of the carrier, the head of the finished blankcomes in contact with the lower edge of a plate 56 which is secured tothe guide member andpositively ejects the blank from the carrier thru anopening 57 of the guide member 23 and registering with an opening 58thru the housing.

I claim 1. The combination with a ram of a press and the dies thereof;of presentation mechanism for headed blanks, comprising a chute fordelivering blanks to be pointed, a carrier disk with circumferentialslots adapted to register with the outlet of the chute to receivetherefrom and to hold the shank of a blank,--means actuated from the ramof the press to impart rotational movement to the disk, and including apawl oscillatable from said ram and a ratchet connected with the diskand actuated by said pawl, locking means to hold the disk rigid duringperiods of rest when a slot thereof'registers with the dies andincluding a spring urged detent and a notched plate connected with thecarrier disk and engaged by the detent, and releasing means thereforconsisting of a spring drawn nose member movable with the said pawl.

To this end, there is adjustably at-' 2. The combination with a ram of apress I and the dies thereof; of presentation mechanism for headedblanks, comprising a chute for delivering blanks to be pointed, acarrier disk with circumferential slots adapted tc register with theoutlet of the chute to receive therefrom and to hold the shank of ablank, means to rotate said carrier disk, a guide member surrounding thedisk for retaining therein the blanks carried thereby, and meansincluding a yielding support to insure proper alignment of the blank inone of the dies.

to register with the outlet of the chute to receive therefrom and tohold'the shank of a blank, means to rotate said carrier disk, a guidemember surrounding the disk for retaining therein the blanks carriedthereby,

and a yielding abutment to accommodate operated on axial recoil of theblank when by the dies.

4. The combination with a ram of a press and the dies thereof;ofpresentation mechanism for headed blanks, comprising a chute fordelivering blanks to be pointed, a carrier disk with circumferentialslots adapted to register with the outlet of the chute to receivetherefrom and to hold the shank of a blank, means to rotate said carrierdisk, a guide member surrounding the disk for retaining therein theblanks carried thereby, and means to insure proper alignment of theblank in ong of the dies.

5. The combination with a ram of a press and the dies thereof; ofpresentation mechanism for headed blanks, comprising a chute fordelivering blanks to be pointed, a carrier disk with circumferentialslots adapted to register with the outlet of the chute to receivetherefrom and to hold the shank of a guide member surrounding the diskfor retaining therein the blanks carried thereby,

and means movable with one of the dies to insure proper alignment of theblank in the other of said dies.

6. The combination with a ram of a press and the dies thereof; ofpresentation mechanism for headed blanks, comprising a chute fordelivering blanks to be pointed, a carrier disk with circumferentialslots adapted to register with the outlet of the chute to receivetherefrom and to hold the shank of a blank, means to rotate said carrierdisk, a guide member surrounding the disk for retaining therein theblanks carried thereby, and means to accommodate recoil of the blankwhen operated on by the dies.

7. The combination with a ram of a press and the dies thereof; ofpresentation mechanism for headed blanks, comprising a chute fordelivering blanks to be pointed, a carrier disk with-circumferentialslots adapted to register with the outlet of the chute to receivetherefrom and to hold the shank of a blank, means to rotate said carrierdisk, a guide member surrounding the disk for retaining therein theblanks carried thereby, and a lever spring-urged in the direction of thehead of a. blank to accommodate recoil thereof when acted upon by thedies, and an adjustable stop therefor.

8. The combination with a ram of a press and the dies thereoffj ofpresentation mechanism for headed blanks, comprising a chute fordelivering blanks to be pointed, a carrier disk wit circumferentialslots adapted to register with the outlet of the chute to re-v ceivetherefrom and to hold the shank of a blank, means to rotate said carrierdisk, a guide member surrounding the disk for retaining therein theblanks carried thereby, and spring-urged means supporting the blankduring the operation of 'the dies thereon and adapted to move a finishedblank into its slot of the carrier disk.

9. The combination with the ram of a blank pointing press and thepointing dies thereof; of presentation mechanism wfor headed blankscomprising a housing, an 'inclined chute delivering therein blanks to bepointed, a carrier disk with circumferential slots adapted to registerwith the outlet of the chute to receive a blank therefrom and to holdthe shank thereof, an annular guide member rigidly mounted within thehousing and surrounding the circumference of said carrier disk, providedwith an opening. therethru for the said chute and an outlet therefromfor a finished blank, means actuated from the ram to impart intermittentrotational movement to the disk, lockin means to hold the disk rigidduring perio s of rest when a slot thereof registers with, the dies,releasing means therefor, means movable with one of the dies adapted tostraddle the shank of the blank to insure proper alignment of same inthe other of said dies, means to accommodate recoil of the blank, andspring-urged means supporting the blank during the pointing operationand adapted to move a pointed blank into its slot of the carrier disk.

10. The combination with the ram of a blank inting press and thepointing dies thereo of presentation mechanism for headed blankscomprising a housing, an inclined chute delivering therein blanks to bepointed, a carrier disk with circumferential slots adapted to registerwith the outlet of the chute to receive a blank therefrom and to holdthe shank thereof, anannular ide member rigidly mounted within the ousing and surrounding the circumference of said carrier disk, providedwith an opening therethru for the said chute and an outlet therefrom fora finished blank, means actuated from theram to impart intermittentrotational movement to the disk, and including a telescopic resilientconnecting member 7 sprin -urged detent and a notched plate connectewith the carrier and engaged by the detent, releasing means thereforconsisting of a spring drawn nose member movable with the said pawl,means movable with one of the dies adapted to straddle the shank of theblank to insure proper alignment of same in the other of said dies,means to accommodate recoil of the blank including a lever spring-urgedtoward the head of a blank in the die and an adjustable stop therefor,spring-urged means supporting the blank during the pointin operation andadapted to move a pointed i1 ank into its slot of the carrier disk, andmeans to effect the discharge of a finished blank from the carrier diskthru the said outlet of the annular guide member and consistin of aplate secured to the guide member hind the carrier and presenting anedge for engagement with the head of a blank.

Signed at New York, in the county of Bronx and State ofNew York, this14th day of February, A. D. 1924.

ARTHUR N. CALKIN'S.

